Propagation of cross - correlation function in divided - wavefront interferometry 分波前干涉法中空間互相關(guān)函數(shù)的傳輸
Cross - correlation function 互相關(guān)函數(shù)
The original pitch detection algorithm in wi coder is based on normalized cross - correlation function ( nccf ) 本課題wi編碼器原本采用基于歸一化互相關(guān)函數(shù)( normalizedcross - correlationfunction , nccf )的基音檢測算法。
The diffraction formula and statistical law of optical fields are used to get the cross - correlation function of intensities of laser speckles of the moved diffuse object 該方法利用光傳播的菲涅爾衍射公式和光場的統(tǒng)計(jì)規(guī)律,給出散斑場光強(qiáng)在散射體位移前后的高斯光束相關(guān)函數(shù)的表達(dá)式。
The signal process function of the software include these function : digital filter , windowing , auto - correlation function and cross - correlation function , mean and variance , probability density function and probability distribution function statistic ; auto - power spectrum , cross - power spectrum , frequency response function , coherence function , cepstrum analysis based on fft ( fast fourier transfer ) ; joint time - frequency analysis based on stft ( short - time fourier transfer ) 軟件的處理功能包括:數(shù)字濾波、時(shí)域加窗、自相關(guān)與互相關(guān)處理、均值和方差計(jì)算、概率密度和概率分布函數(shù)計(jì)算;在快速傅立葉變換( fft )基礎(chǔ)上計(jì)算自功率譜、互功率譜、頻率響應(yīng)函數(shù)、相干函數(shù)、倒頻譜分析;基于短時(shí)傅立葉變換( stft )的聯(lián)合時(shí)頻分析等。